. >> reporter: a longtime patient, ellen is hoping to be a nurse. she hopes she'll get to see it. >> i'm hopefully going to be working here every day. i can see myself going around being like, they put that in because of me. they made the coral orange. >> reporter: it will marry safety and solitude. >> we were limited on what kind of plant material we could use here and how much water to use. we had to abstract what nature is. light and water is what nature relies on. >> reporter: the water will calm and create music. >> there are these two fountains. my background in music shaped how this garden is designed. and whole choreography is of different sounds of different kinds of water, both real and recorded. >> we have exclusive access to the children's hospital. we'll take you behind the walls and through the building to see the mammoth project to lure people to chicago for care. >> thank you. >>> real taste of fall weather coming our way. >> jim ramsey has details on the big drop when we come back. wow! it's even bigger than i thought. welcome to pr